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#  Copyright (C) 2003,2004, 2007 Free Software Foundation, Inc.

#  Contributed by Kelley Cook, June 2004.

#  Original code from Neil Booth, May 2003.

#

# This program is free software; you can redistribute it and/or modify it

# under the terms of the GNU General Public License as published by the

# Free Software Foundation; either version 3, or (at your option) any

# later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; see the file COPYING3.  If not see

# <http://www.gnu.org/licenses/>.

# This Awk script reads in the option records generated from

# opt-gather.awk, combines the flags of duplicat options and generates a

# C file.

#

# This program uses functions from opt-functions.awk

#

# Usage: awk -f opt-functions.awk -f optc-gen.awk \

#            [-v header_name=header.h] < inputfile > options.c

BEGIN {

        n_opts = 0

        n_langs = 0

        quote = "\042"

        comma = ","

        FS=SUBSEP

        # Default the name of header created from opth-gen.awk to options.h

        if (header_name == "") header_name="options.h"

}

# Collect the text and flags of each option into an array

        {

                if ($1 == "Language") {

                        langs[n_langs] = $2

                        n_langs++;

                }

                else {

                        name = opt_args("Mask", $1)

                        if (name == "") {

                                opts[n_opts]  = $1

                                flags[n_opts] = $2

                                help[n_opts]  = $3

                                n_opts++;

                        }

                }

        }

# Dump that array of options into a C file.

END {

print "/* This file is auto-generated by opts.sh.  */"

print ""

n_headers = split(header_name, headers, " ")

for (i = 1; i <= n_headers; i++)

        print "#include " quote headers[i] quote

print "#include " quote "opts.h" quote

print "#include " quote "intl.h" quote

print ""

print "#ifdef GCC_DRIVER"

print "int target_flags;"

print "#endif /* GCC_DRIVER */"

print ""

for (i = 0; i < n_opts; i++) {

        name = var_name(flags[i]);

        if (name == "")

                continue;

        if (flag_set_p("VarExists", flags[i])) {

                # Need it for the gcc driver.

                if (name in var_seen)

                        continue;

                init = ""

                gcc_driver = 1

        }

        else {

                init = opt_args("Init", flags[i])

                if (init != "")

                        init = " = " init;

                else if (name in var_seen)

                        continue;

                gcc_driver = 0

        }

        if (gcc_driver == 1)

                print "#ifdef GCC_DRIVER"

        print "/* Set by -" opts[i] "."

        print "   " help[i] "  */"

        print var_type(flags[i]) name init ";"

        if (gcc_driver == 1)

                print "#endif /* GCC_DRIVER */"

        print ""

        var_seen[name] = 1;

}

print ""

print "/* Local state variables.  */"

for (i = 0; i < n_opts; i++) {

        name = static_var(opts[i], flags[i]);

        if (name != "")

                print "static " var_type(flags[i]) name ";"

}

print ""

print "const char * const lang_names[] =\n{"

for (i = 0; i < n_langs; i++) {

        macros[i] = "CL_" langs[i]

        gsub( "[^A-Za-z0-9_]", "X", macros[i] )

        s = substr("         ", length (macros[i]))

        print "  " quote langs[i] quote ","

    }

print "  0\n};\n"

print "const unsigned int cl_options_count = N_OPTS;\n"

print "const struct cl_option cl_options[] =\n{"

j = 0

for (i = 0; i < n_opts; i++) {

        back_chain[i] = "N_OPTS";

        indices[opts[i]] = j;

        # Combine the flags of identical switches.  Switches

        # appear many times if they are handled by many front

        # ends, for example.

        while( i + 1 != n_opts && opts[i] == opts[i + 1] ) {

                flags[i + 1] = flags[i] " " flags[i + 1];

                i++;

                back_chain[i] = "N_OPTS";

                indices[opts[i]] = j;

        }

        j++;

}

for (i = 0; i < n_opts; i++) {

        # Combine the flags of identical switches.  Switches

        # appear many times if they are handled by many front

        # ends, for example.

        while( i + 1 != n_opts && opts[i] == opts[i + 1] ) {

                flags[i + 1] = flags[i] " " flags[i + 1];

                i++;

        }

        len = length (opts[i]);

        enum = "OPT_" opts[i]

        if (opts[i] == "finline-limit=")

                enum = enum "eq"

        gsub ("[^A-Za-z0-9]", "_", enum)

        # If this switch takes joined arguments, back-chain all

        # subsequent switches to it for which it is a prefix.  If

        # a later switch S is a longer prefix of a switch T, T

        # will be back-chained to S in a later iteration of this

        # for() loop, which is what we want.

        if (flag_set_p("Joined.*", flags[i])) {

                for (j = i + 1; j < n_opts; j++) {

                        if (substr (opts[j], 1, len) != opts[i])

                                break;

                        back_chain[j] = enum;

                }

        }

        s = substr("                                  ", length (opts[i]))

        if (i + 1 == n_opts)

                comma = ""

        if (help[i] == "")

                hlp = "0"

        else

                hlp = quote help[i] quote;

        neg = opt_args("Negative", flags[i]);

        if (neg != "")

                idx = indices[neg]

        else {

                if (flag_set_p("RejectNegative", flags[i]))

                        idx = -1;

                else {

                        if (opts[i] ~ "^[Wfm]")

                                idx = indices[opts[i]];

                        else

                                idx = -1;

                }

        }

        printf("  { %c-%s%c,\n    %s,\n    %s, %u, %d,\n",

               quote, opts[i], quote, hlp, back_chain[i], len, idx)

        condition = opt_args("Condition", flags[i])

        cl_flags = switch_flags(flags[i])

        if (condition != "")

                printf("#if %s\n" \

                       "    %s,\n" \

                       "#else\n" \

                       "    CL_DISABLED,\n" \

                       "#endif\n",

                       condition, cl_flags, cl_flags)

        else

                printf("    %s,\n", cl_flags)

        printf("    %s, %s }%s\n", var_ref(opts[i], flags[i]),

               var_set(flags[i]), comma)

}

print "};"

}